Moved - Calculate angle at which planes -x-2y+z-5=0, i -2x+y-2z+1=0 intersect

[mati89]

Calculate the angle at which the planes intersect


-x-2y+z-5=0 i -2x+y-2z+1=0

 

[tkhunny]

Calculate the angle at which the planes intersect


-x-2y+z-5=0 i -2x+y-2z+1=0

Can you find any of these...

Direction Numbers
Direction Cosines
Normal Vectors

For each plane?

 

[HallsofIvy]

Calculate the angle at which the planes intersect


-x-2y+z-5=0 i -2x+y-2z+1=0

One plane has normal vector <-1, -2, 1> and other has normal vector <-2, 1, -2>. What is the angle between the two vectors?

Why was this posted in "Probability and Statistics"?